Bad Omen controlled blocks

Imagine a new set a soul themed blocks that are very tough to break (or are unbreakable). But if the player gets bad omen, they can break the blocks much quicker. These blocks can be used for various playstyles, but I imagine these blocks being used for a nether dungeon. You could either play by the rules, or you could get bad omen, and be able to break blocks at the expense of harder enemies.